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2 years ago

Find the LCM of 120 and 210.

Mathematics

2 answers:

klio [65]2 years ago

7 0

Answer:

120 = 2³ × 3 × 5

210 = 2 × 3 × 5 × 7

LCM(120 ; 210) = 2³ × 3 × 5 × 7 = 840

Troyanec [42]2 years ago

4 0

Answer:

840

Step-by-step explanation:

Multiples of 120:

120, 240, 360, 480, 600, 720, 840, 960, 1080

Multiples of 210:

210, 420, 630, 840, 1050, 1260

Therefore,

LCM(120, 210) = 840

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2 years ago

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2^x + 3^y = 9 2^x+1 - 3^y+1=8 find x and y

Taya2010 [7]

Suppose :

2^x = t ..**&**.. 3^y = u

_____________________________

t + u = 9 × 3 3t + 3u = 27

=====》

2t - 3u = 8 2t - 3u = 8

+ __________

5t = 35

5 × t = 5 × 7

t = 7

u = 2

________________________________

Thus :

2^x = 7 ===》 x = Log _ 2 { 7 }

3^y = 2 ===》 y = Log _ 3 { 2 }

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2 years ago